Door-check.



G. P. DOEN.

DooR CHECK. 909,568, I I 4,1908. Patented Jan. 12,1909.

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UNITED STATES PATENT OFFICE.

CHARLES l. DORN, OF NAPERVILLE, ILLINOIS, ASSIGNOR OF ONE-HALF TO HENRY DE TAMBLE, OF AURORA, ILLINOIS.

DOOR-CmCK.

Application filed February 14, 1908.

To all whom it may concern:

Be it known that I, CHARLES P. DORN, citizen of the United States, residing at Naperville, in the county of Du Page and State of Illinois, have invented certain new and useful Improvements in Door-Checks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a novel construction in a device adapted to maintain doors rigidly in an open position for purposes of ventilation, the object being to provide a simple and neat device of this character and consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating my invention: Figure -1- is a plan section of a door equipped with a device constructed in accordance with my invention. Fig. -2-- is a fragmentary detail View in elevation of a clamping device employed. Fig. -3- is a detail longitudinal section of the saine on the line 33 of Fig. -2*.

My invention has for its object to provide a so-called door check which is adapted to be secured to the hinge end of the door and door frame in order to avoid the objectionable rattling and inconvenience usually presented by the door checks now generally used and which are secured to the free end portion of the door and the adjacent portion of the frame.

A further object 0f the invention is to provide a simple, conventient, strong, durable and easily operable door check which can be released at any time without necessitating irst closing the door.

To the above and other ends my invention comprises a pivot member A secured to the door frame adjacent the hinged end of the door and to which a relatively heavy fiat spring B is pivotally secured at one end, said spring being horizontally disposed and at its free end passing through a clamping mem- Speccation of Letters Patent.

Patented Jan. 12, 1909.

Serial No. 415,982.

ber C. The latter comprises a plate secured to the door and provided with parallel side iianges D between which an L-shaped lever E is disposed, the latter being provided adjacent the elbow thereof with projections F entering openings in said flanges D to pivotally secure said lever. The short arm Gr of said lever acts similarly to an eccentric and bears upon and clamps the free end portion of said spring B between the same and the said plate, thus holding said spring against longitudinal movement relatively to said plate, and thereby also holding the door against swinging in either direction.

In view of the fact that force applied to close the door may throw said lever out of engagement with the spring in an obvious manner, I prefer to provide a series of perforations I-I in the latter disposed at short intervals and provide a projection I on the free end portion of the lever E which is adapted to enter said perforations and thus further prevent a longitudinal movement of thespring with relation to said clamping device. It will be understood, of course, that said spring B must be suliic'iently heavy to prevent buckling under compression, and that any suitable stiffening means may be applied to said spring to accomplish the end sought.

My said device performs all of the functions of the ordinary door check besides serving to prevent closing of the door by drafts and obviating the rattling of such other devices when the door is swayed by drafts.

I claim as my invention:

A device of the kind specified comprising a member mounted on the door frame, a horizontally disposed flat spring pivotally secured thereto, there being perforations in the free end portion of said spring, a U- shaped plate mounted upon the door, a belln crank lever pivotally mounted at its elbow portion in the flanges of said U-shaped member, and a projection on the free end portion of the lever arm of said bell-crank lever, the free end portion of the said spring passing between said bell-crank lever and the middle portion of said U-shaped plate,

one arm of said bell-crank lever being adapted to bear upon said spring between the same and said middle portion of said U- shaped plate, the said projection on the lever arrn of said bell-crank lever entering one of said perforations in said spring, substantially as and for the purpose described.

In testimony whereof I have signed my name in the presence of two subscribing Witnesses.

CHARLES P. DORN. Witnesses N. E. SGHILITZ, CHAS. HAENI. 

